is a generic term that is used to describe a system that transmits via radio waves, the identity & information of a Tag(s). These RFID-tags are in fact, special labels with embedded tiny radio transponder and a microchip mounted on a substrate. The RFID-tags are attached to any and all items requiring monitoring because unique and specific information can be securely written to each RFID tag.
RFID-tags are available in many different shapes and sizes, to suit the item e.g. truck tyres, oil & gas piping, containers, crates, clothes etc.
To retrieve the data stored on a RFID tag, you need a reader. A typical reader is a device that has one or more antennae that emit radio waves and receive signals back from the tag.
Whenever any such RFID tag (attached to an item) passes a RFID reading antenna, the unique and specific information is automatically read and this information is transferred in digital form to a computer system.